| Gahanna to Butzbach | 4,223.74 mi (6,797.45 km) |
| Gahanna to Buxtehude | 4,161.90 mi (6,697.92 km) |
| Gahanna to Cadolzburg | 4,342.70 mi (6,988.90 km) |
| Gahanna to Calbe | 4,290.81 mi (6,905.40 km) |
| Gahanna to Calw | 4,285.01 mi (6,896.06 km) |
| Gahanna to Castrop-Rauxel | 4,135.70 mi (6,655.77 km) |
| Gahanna to Celle | 4,203.91 mi (6,765.54 km) |
| Gahanna to Cham | 4,419.63 mi (7,112.71 km) |
| Gahanna to Chemnitz | 4,370.98 mi (7,034.42 km) |
| Gahanna to Clausthal-Zellerfeld | 4,240.89 mi (6,825.05 km) |
| Gahanna to Cloppenburg | 4,121.64 mi (6,633.14 km) |
| Gahanna to Coburg | 4,317.74 mi (6,948.74 km) |
| Gahanna to Coesfeld | 4,117.24 mi (6,626.05 km) |
| Gahanna to Cologne | 4,141.50 mi (6,665.10 km) |
| Gahanna to Coswig | 4,384.82 mi (7,056.69 km) |
